Well strainer



G. W. WOODS July 18, 1933.

WELL STRAINER Filed Oct. 5, 1931 2 Sheets-Sheet FIG. 2

FIG. 3

GORHAN n'. WOODS lNVENTOR ATTORNEY G. W. WOODS July 18, 1933.

WELL STRAINER Filed Oct. 5, 1931 2 Sheets-Sheet FIG FIG. 5

FIG.4-

GORHAH YY. WOODS INVENTOR W Km 4 ATTORNEY Fatenteel .lnly l3, 1%33 H a was g i v Ll GORHADE N. W 3032 strum f LS7 ASSIGBIIGR- Ti TOOL COMPANY, OF A CGREC-RATIOEQ' OF TEXAS j ST ZAINETQ be decreased.

I desire to form a strong anddurablo device in which the sizes the strai'; openings may be aricd readily to suit the type of formation in which the device is user In the drawings herewith Fig. 1 is a side view, partly in central vertical. t on, of a strainer embodying my invention.

Fig. 2 is a transverse section of the strainer shown in Fig. 1.

Fig. 3 is a detail showing the lower end of the strainer in elevation.

b d is a view similar to Fin. 1 but illustrating a different form of the invention.

Fig. 5 is a broken perspective detail of the construction employed in the Fig. embodiment.

of construction.

In Figs. l-to 8, the body of the st ainer is made up of ribbon shaped strips of sheet metal, such as nickel. not easily corroded and resistant to abrasion. I employ alterhate strips or layers of this material. One strip is crimped or transversely corrugated and the adjacent strip 7 is a i lane flat strip.

These laye 5 may be circular plates, but

. prefer to Wind the strips spirally around a mandrel of "the proper size. said mandrel being shown at 13 in T" 2. I thus to m a helix in which the (a 1 ated s rip ttorms straining; op x 8 through \v h fluid may pass. At the upper and lower ends '1 place collars 9 and 10 respeooively one oi which is internally threaded at ll, While the other is externally threaded at 12. Thus the assembled strainer section may be connected in the line of casing.

The adjacent layers of ribbon may be setion whereby the costto the consumer may 6 is a transverse section of this type implication filed @ctober 5, 1931. Serial lie. 566,855.

cured together by Welding or other Well known metl ds. or I may secure the ribbons together and also secure the collars to the 'ng Wall by heating in the presence of 1 hydrogen.

in securing th parts together by heating, I employ ninner tubular mandrel 13 of iron or steel and surround the same With a l: of noncombustible material suchv as asbestos indicated at 14; 111 Fig. 2. About us core the layers of ribbon are Wound and in {wil 0.0 11 t w t A t anc are se in poor ion. 11 outer sleeve 15 of iron or steel, lined W1th a l i: w: of 16 is then placed over the til ti assembled strainer and the assembly is rea ly for heat treatment.

"lhe iro pipes 13 and 15 are treated beuse by boiling in hydrochloric acid or the like until a large amount of hydrogen is absorbed. hereafter, when the strainer is halted at a temperature ranging about 1800 F. for about 2O'hours the hydrogen is released and assists in preventing oxidation; and the metal parts will form a bond at all contacting points so as to result in an integral strainer with What appear to be welds at the points of contact. Although the temperature is below the point of fusion of iron or nickel. the parts appear to be fused together Where they contact With other metal.

In Figs. 4- to .6. the construction is varied by running the ribbons longitudinally of the Wall of the strainer. As Willbe seen from Fig. 5, the crimped strip 6 is placed between alternate strips 7 Which are plane. I out these strips the length of the strainer wall dcs'red and place them about the mandrel as in the previous embodiment toform a strainer tube of the desired diameter. The strips are preferably radial. as seen in F 6. and I may employ reinforcing and spacing strips 17 at intervals around the wall will be clear from,Fig. 6.

This str nor Wlll be secured together in the manner previously described relative to the embodiment with collars at each end as shown in Fig. 4.

A strainer formed in this manner may be varied to the sizes of the'openings 8 by the pitch of the corrugations in the ribbon 6 in an obvious manner. Also it will be possible to make the strainer pipe of various diameters by the use of mandrels 13 of the desired diameters. The strainer will have a foraminated Wall which is open to the passage of fluid throughout its exposed area.

It will be clear that a strainer of this construction will be comparatively cheap to make and Will be. eflicient in use due to its large straining area.

lVhat I claim as new is:

1. A well strainer having a cylindrical straining wall made up of alternate fiat and transversely corrugated strips of sheet metal secured 1 together, and connecting collars formed thereon at each end.

, GORHAM W. Woons. 

